Coffee and water urn.



J. S. LANGWORTHY.

COFFEE AND WATER URN.

APPLICATION FILED JUNE 27, 1908.

Patented July 12, 1910.

2 SHEETS-SHEET 1.

INVENTOR S E S S E N n W J. S. LANGWORTHY. COFFEE AND WATER URN. APPLICATION FILED JUHE27, 190s.

Paten ted July 12,1910.

2 SHEETS-SHEET 2.

INVE NTOR WITNESSES:

. tates many 'repourings and soaking of the JOHN S. LAHGWOBTHY, 0F HEW YORK, YJ, AS$IGNOIL OF ONE-HALF TO ELIE J. i MONEUSE, OF NEW YORK, N. Y.

COFFEE AND WATER URN.

Specification of Letters Patent.

Patented July 12, 1910.

To all whom it may concern:

Be it known that I, Jorm S. LANG won'rrrr, a citizen of the United States, residin in the'borough of Brooklyn, county of Klngs, city and State of New York, have invented certain new and useful Improvements in Coffee and Water Urns, of which the following is a specification.

This invention aims to provide certain improvements in ap aratus for making so- -called drip co ea, .in which the boiling The finer the cofiee is ground the more easily the oil is extracted from it in the passage of the hot water. and the greater the strength secured. But it is also true that the finer the grinding of the coffee the more closely it packs and the greater the resistance to the passage of the Water, so that with ordinary open bags much of the water is forced through the sides of the bag above the cofiee, necessitating the pouring of the water back into the bag again and. again several times until the proper amount of oil has been extracted from the coffee. The more finely ground coffee is also apt to be carried through the ba to some extent and. to cloud the liqui From these considerations it has resulted that moderately coarse cofiee is ordinarily used, and this necessiparticles, and the extraction of tannin so as to give ah objectionable bittertaste It has also been the common. practice to heat the water in a separate vessel and pour it upon the ground coffee in a large quantity, or to pipe the water to the urn and leave it to the operator to admit whatever water he guesses to be advisab e, and this practice introduces a large element. of chance and irregularity in the product.

uantity of According to the presentinvention an apparatus is provided which with a single percolation through the ground coffee extracts all the desired properties without such a long soaking as to have a' bitter taste, permits the use of less cofiee than is now customary, and provides beforehand a definite quantity of water which is heated and automatically introduced upon. the ground coffee. Further advantages are referred to in detail-hereinafter.

The accompanying drawings illustrate embodiments of my invention.

Figure 1 is a vertical diametral section of one type of apparatus. 2 is a similar section of another type.

Referrin to the apparatus'illustrated, the ground co ee- A is entirely inclosed in a pocket, and the body of waterB which is to be converted into coffee is carried in a vessel C and passes through the coffee and thence into a retaining vessel D. The vessel 0,

which may be called the percolator, has adouble bottom, the upper wall E being finely perforated so as to distribute the water over the surface of the cofi'ee and to relieve the cofiee of the pressure and to restrict the rate of flow of the water upon the cofiee. The upper bottom E of the percolator may be permanently attached or it may be removable, simply resting upon an internal shoulder on the wall of the percolator as shown. For retaining the codes a coarsely perforated plate F is provided which constitutes substantially a support for a sheet G of filtering cloth or fine paper or the like. The filtering sheet G may be made all the finer without danger of breakage by reason of the support which it receives from the perforated plate F. The plate F is provided with a coarsely threaded flange 'l-l screwing upon a corresponding thread on the lower edge of the side of the percolator andgfitting the same looselyso as to engage the edge of the filtering sheet'of cloth or aper between the two screwhreads and he d the sheet firmly in place. The edge of the sheet'is held by the en'ga ement of the lower edge of the wall of t e percolator with the flat margin 'of'zthe perforated plate l Where the a sheet. era the upper bottom is made removable the coffee may be inserted from above.

- The retaining vessel D for the coffee is provided with a draw-off pipe J at its lower end, running to a cock, and is supported by a. flange K at its upper edge which rests upon a suitable rib on the inner wall of the sun-mnding annular vessel. A space is provided between the vessel D and the surrounding vessel, which space is ada ted to receive water which is kept hot an which keeps the coffee in the inner vessel D also hot (this feature of the a paratus bein shown also in the improv ap aratus o my application No. 557,655, filetf April 26, 1910, and being claimed in said application). This surrounding space or chamber L will carry a gage M at the outside with a filling cock at the to and adraw-oflf cock at the bottom. A siim ar gage N is also provided for the coffee-retaining vessel with connections at the top and bottom, as shown.

The outermost chamber 0 is formed between two cylindrical walls, an inner wall P and an outer wall Q, and is closed by a head R at the top and by the base B of the apparatus at the bottom. This is the vessel which carries the supply of water all or part of which is to be converted into coffee. For transferring the water from the vessel 0 to the percolator, a ipe S runs down into the outermost vessel to any desired extent, and asses through a tight joint in the top of this vessel, being provided above with a cock T and a spigot U, so that when the cock is opened the water in thevessel 0 may be transferred to the percolator. A safety valve V is provided at the top. The outer wall of the apparatus is provided with a flange W which supports.

a cover X. A water age Y serves for observing the amount 0 water in the outermost space, and also through its connection for admitting and drawing. off water to and from the outer space. I

In use the reservoir or outside water-jacket O and the inner water chamber L are filled with water, after which a gas burner or other heating means is applied directly be-.,

low the outer chamber. The ercolator is lifted out and the coffee and fi tering sheet applied. The percolator carrying the coffee being restored to place, as soon as the water in the outer jacket comes to the boilin point and the necessary pressure is generate within the jacket, water preferably in quantity suficient to fill the chamber D is forced upward through the pipe S andthe spigot U into the percolator. The quantit of water is determined by the length of t e pipe S. It will be seen that when sufficient water has been drawn through the pipe to fill the chamber D, there still remains a large amount of hot water in the chamber'O that tom, an

part of my mvention, an furnishes all the essential requirements for both coffee making and other hot water purposes. Or the pipe ma be arranged to extend to the bota hand-valve T used to control the quantity of water. The boiling water in the percolator C passes through the cofi'ee, carryin with it the extracted oil in the manner escribed, and is retained in the vessel D, where it is kept at the proper temperature by the water in the intermedlate chamber L. The water in the intermediate chamber L is not heated directly by the gas or other heatingmeans, and is not heated sufficiently to b011, but is kept at a steady and high heat by the outer jacket of water. This preserves the vessel D from the danger of injury which would result if it came in direct contact with the necessarily boiling water in the outer chamber 0, and at the same time prevents the overheating of the liquid coffee. For the best results the liquid fcolfee should be kept slightly below the boilin point, as it thus retalns its freshness and avor for a longer time, and is not subject to the disintegration changes which take place at the boiling point. The vessel D can under these conditlons be made of earthenware or enameled metal which isa great advantage from the point of view of cleanliness.

An important feature of the percolator which adapts it for use in a variety of sizes and under different conditions is the fact that it permits of the use of a great variety of filtering material. Some percolators are ada tedfor the use of very thin paper or the ike, and some for the use of only cloth or heavy paper." Where the apparatus is designed to use heavy paper, thin paper cannot e used because the joint provided is not tight and the water will find its way through the joint without passing through the tering material. The rovision of a loose threaded connection 0 the two parts between which the filtering sheet is held, as previousl explained makes it possible to make a t oroughl tight joint by screwing up the parts 'har and that whether thin or thick filtering material is used. Oonsequentl the operator can use either coarsely ground or finely ground cofiee so as to get the best results from the particular grade of coffee at hand.

It is withinthe invention to omit the intermediate chamber shown in Fig. 1 and to constructthe apparatus as in Fig. 2 with only an outer chamber 0 and a retaining vessel D lying immediately in the water in this outer chamber. The pipe S is shown this case extending only partly down int-b the water chamber, so that the level of the water ring shall never be below about the middle point. Thepercolator C is provided with a detachable lower portion Z screwing into the body of the percolator, and is supported upon the apparatus by means of a flange a. The vessel D in this case is screwed into a collar upon the upper end of the water vessel. An alcohol lamp is represented at b for heating the water.

What I claim is v 1. A coffee-making apparatus including in combination a vessel C with a double bottom, the upper bottom consisting of a finely perforated sheet E, and the lower bottom of a coarsely perforated sheet F of metal, the latter being attachable to the lower edge of the vessel by a loosely fitting screw-thread, whereby a sheet of filtering material may be laid upon the perforated sheet F and may be fastened in place by screwing the latter up tight on the lower edge of the vessel, the space between the two bottoms E and F being adapted to contain the cofiee, and the space above the bottom E being adapted to carry a supply of water which is distributed upon the cofiee by the plate E, and percolaltes tllzi rough the filtering material and the p ate 2. A coffee-making apparatus including in combination a percolator, a coffee retaining vessel below said percolator, a water vessel surrounding the cofiee vessel, and a pipe extending down into the watervessel and upward over the percolator, the water vessel being closed so that by applying heat I thereto the water will be forced over into the percolator and will pass therefrom into the cofiee-retaining vessel, the lower end of said pipe being above thelevel of the bottom of the coffee-retaining vessel, so as to leave in the water vessel a quantity of water surrounding theymade coffee, and the space in the water vessel above the lower end of the pipe being approximately equal in volume to that in the coffee-retaining vessel.

3; A coffee-making apparatus including in combination a percolator and a coffee-re tainlng vessel of approximately the same capacity-below said percolator, a surrounding water vessel having a capacity sufficient toapproximately fill said percolator and to retain a quantity sufficient to surround the greater part of said coffee-retaining vessel,

and a pipe extending down into the water vessel and upward over the percolator, the water vessel being closed so that b applying.

heat thereto water will be force over into the percolator, said pipe being extended down into the water to a point above the level of the bottom of the coffee-retaining vessel so as to leave in the water vessel a quantity of water surrounding the made coffee.

f. A coffee-making apparatus including in combination a percolator, a coffee retaining vessel below said percolator, a water vessel surrounding the coffee vessel, and a pipe extending down into the water vessel to a point approximately level with the upper part of the coffee-retaining vessel and upward over the percolator the water vessel being closed so that by applying heat thereto part of the water will be forced over into the percolator and will pass therefrom into the coffee-retaining vessel, and the water remaining in saidwater vessel will retain the heat in the coffee-retaining vessel.

5. A. coffee-making apparatus including in combination a percolator C, a vessel D for retaining liquid coffee arranged below said percolator, said apparatus having a chamber 0 surrounding said vessel D, a pipe S extending down into the. chamber 0 to a point approximately level with the upper part of the vessel D and out of the upper part thereof and having a spigot U extending over the percolator C.

6. A cofi'ee-making. apparatus including I in combination vertical walls P and Q, and upper and lower walls forming a closed chamber 0 for carrying water, said wall P having a rib on its inner face, a vessel D for carrying liquid coffee and having a flange K supported upon said rib on the inner face of the wall P, a percolator C having at its upper end a flange resting upon the top of .the chamber O, an intermediate chamber L being formed between the vessel D and the outer chamber 0, a pipe S in said outer chamber 0 and extending up through the top and having a spigot U adapted to,dis-- charge into the percolator, whereby when applyingheat to the water in the outer chamber to boil the same sufiicient water is driven over into the percolator to make the desired quantity of coffee, and passes thence into the liquidcofiee vessel D, where it is maintained at a high temperature below the boiling point by contact with the water in the chamber L, said ipe S terminating at its lower end at a point above the level of the bottom of the vessel D, so as to leave 'sufiicient water in the outer chamber 0 for the ordinary uses of a separate hot water urn and to heat by contact/the water in the intermediate chamber L. r

7 A coffee making apparatus including in combination a vessel C with a double bottom consisting of erforated-sheets, the lower sheet being attac able to the lower edge of the vessel by a loosely fitting screw-thread, whereby a sheet :of filtering material may be laid upon the lower sheet and fastened in place by screwing up said lower sheet tight on the lower edge of the vessel, the space hetween the two sheets being adapted to contain the coffee and the s sheet being adapted to carry water which is dlstributed upon the cofi'ee by 5 said upper perfor ated through the filtering material and the lower sheet.

, eeepzei "In witness whereof, I have hereunto pace above the upper signed my name in the presence of two suba supply of scribing Witnesses.

- JOHN S.- LAN GWORTHY.

Witnesses:

DOMINGO A. USINA,

Trmonoim T. SNELL.

sheet and percolates 

